The UD-30A’s unique design allows for the demineralizer to be operated underwater and under negative pressure.  This design feature eliminates the need for special bolted pressure closure on the pump housing requiring tooling for operation.  The pump housing seals with a simple flat cover plate held in place by negative pressure during operation.

Unfiltered water enters the UD-30a via one 15mil slot safety screen on the top of the vessel.  The water then travels through the demineralizer bed to the 7 mil outlet screen elements, then through a 15 mil outlet safety screen,  to the suction of the UD-30A pump and out the discharge of the pump. 

The UD-30A also has top camlock connections for sluicing in and out of resin.  The resin can be sluiced while the unit is underwater.

Basic Operation

During refueling outages at nuclear power stations, it is necessary to maintain water chemistry in the spent fuel pool and reactor cavity. Tri Nuclear Corp.  has developed a compact underwater demineralizer which meets this need.

· Process rate of up to 40 GPM

· 10 cubic feet resin capacity (supplied by customer)

· Underwater service requiring no additional shielding

· Resin easily charged and sluiced

· Pump/motor assembly easily and remotely replaced from vessel

· Cam-lock connections for quick system hook-up

· Self contained system

Equipment supplied with the

UD-30A